Chargino Pair Production at $e^+e^-$ Colliders with Polarized Beams

S. Y. Choi; M. Guchait; J. Kalinowski; P. M. Zerwas

doi:10.1016/s0370-2693(00)00293-8

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arXiv · hep-ph/0001175

Chargino Pair Production at $e^+e^-$ Colliders with Polarized Beams

S. Y. Choi·M. Guchait·J. Kalinowski·P. M. Zerwas

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Abstract

The chargino $\tildeχ^\pm_{1,2}$ system can be reconstructed completely in $e^+e^-$ collisions. By measuring the total cross sections and the asymmetries with polarized beams in $e^+e^-\to\tildeχ_i^+ \tildeχ_j^- [i,j=1,2]$, the chargino masses and the gaugino-higgsino mixing angles of these states can be determined very accurately. If only the lightest charginos $\tildeχ_1^\pm$ are kinematically accessible, transverse beam polarization is needed to determine the mixing angles unambiguously. From these observables the fundamental SUSY parameters can be derived: the SU(2) gaugino mass $M_2$, the modulus and the cosine of the CP-violating phase of the higgsino mass parameter $μ$, and $\tanβ= v_2/v_1$, the ratio of the vacuum expectation values of the two neutral Higgs doublet fields. [The remaining two-fold ambiguity of the phase can be resolved by measuring the normal polarization of the charginos.]

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S. Y. Choi, M. Guchait, J. Kalinowski, P. M. Zerwas. 2000-01-18. Chargino Pair Production at $e^+e^-$ Colliders with Polarized Beams. https://doi.org/10.1016/s0370-2693(00)00293-8

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